For the purpose of conveniently expressing the form factor of overlapping notch, the author made some approximation in his consideration and introduced a simplified formula for the form factor. As the case of overlapping notches, the author treated the following examples.
(1) torsion of round bar with a shallow overlapping notch,
(2) uniform tension of semi-infinite plate with an overlapping notch.
Theoretical consideration about the form factor are made by taking the mapping function expressed by the Laplace transformation corresponding to the arbitrary form of notch. As an example of this method, the semi-circular notch overlapped by a semi-ellipse are taken. The results of calculation show that the form factor of overlapping notch are expressed by the formula founded on the equation of ellipse.
